# A000492 (b-file synthesized from sequence entry)
6 20
7 154
8 1676
9 14292
10 155690
11 1731708
12 21264624
13 280260864
14 3970116255
15 60113625680
16 969368687752
17 16588175089420
18 300272980075896
19 5733025551810600
20 115148956467702600
21 2427199940533198992
22 53576182138937428377
23 1235917889588345408586